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Finding the Fourth Proportional to 281,006.40, 421,509.60 and 162,616.80

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Solution

The fourth proportional to 281,006.40, 421,509.60 and 162,616.80 is: 243,925.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,006.40 : 421,509.60 = 162,616.80 : x
  2. Step 2: Convert to fraction form
    281,006.40/421,509.60 = 162,616.80/x
  3. Step 3: Cross multiply
    281,006.40x = 421,509.60 × 162,616.80
  4. Step 4: Simplify right side
    281,006.40x = 68,544,542,321.28
  5. Step 5: Solve for x
    x = 68,544,542,321.28/281,006.40
  6. Step 6: Final answer
    x = 243,925.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.